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v3.25.2

Significant Accounting and Reporting Policies - Goodwill and Indefinite-lived Intangible Assets (Details) $ in Millions | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
May 31, 2025 USD ($) reportingUnit | Mar. 01, 2025 USD ($) | Mar. 01, 2025 USD ($) | May 31, 2025 USD ($) | Jun. 01, 2024 USD ($) | Jun. 03, 2023 USD ($)
Indefinite-lived Intangible Assets [Line Items] |  |  |  |  |  |
Goodwill | $ 1,152.4 |  |  | $ 1,152.4 | $ 1,226.3 | $ 1,221.7
Number of reporting units | reportingUnit | 4 |  |  |  |  |
Impairment charges |  |  |  | $ 37.7 | 16.8 |
Trade name |  |  |  |  |  |
Indefinite-lived Intangible Assets [Line Items] |  |  |  |  |  |
Impairment charges |  | $ 37.7 |  |  |  |
Knoll Trade Name |  |  |  |  |  |
Indefinite-lived Intangible Assets [Line Items] |  |  |  |  |  |
Impairment charges |  |  |  |  | 8.9 | 19.7
Impairment, Intangible Asset, Indefinite-Lived (Excluding Goodwill), Statement of Income or Comprehensive Income [Extensible Enumeration] |  |  |  | Impairment charges |  |
Muuto Trade Name |  |  |  |  |  |
Indefinite-lived Intangible Assets [Line Items] |  |  |  |  |  |
Impairment charges |  |  |  |  | 7.9 |
Impairment, Intangible Asset, Indefinite-Lived (Excluding Goodwill), Statement of Income or Comprehensive Income [Extensible Enumeration] |  |  |  | Impairment charges |  |
Valuation Relief From Forecast Growth Rate 10% Decrease | Knoll Trade Name |  |  |  |  |  |
Indefinite-lived Intangible Assets [Line Items] |  |  |  |  |  |
Impairment charges |  |  |  | $ 12.0 |  |
Measurement inputs (as percent) |  |  |  | 10.00% |  |
Valuation Relief From Forecast Growth Rate 10% Decrease | Muuto Trade Name |  |  |  |  |  |
Indefinite-lived Intangible Assets [Line Items] |  |  |  |  |  |
Impairment charges |  |  |  | $ 7.0 |  |
Measurement inputs (as percent) |  |  |  | 10.00% |  |
Royalty Rate | Valuation Approach Royalty Rate 25bps Decrease | Knoll Trade Name |  |  |  |  |  |
Indefinite-lived Intangible Assets [Line Items] |  |  |  |  |  |
Impairment charges |  |  |  | $ 15.0 |  |
Measurement inputs (as percent) |  |  |  | 0.25% |  |
Royalty Rate | Valuation Approach Royalty Rate 25bps Decrease | Muuto Trade Name |  |  |  |  |  |
Indefinite-lived Intangible Assets [Line Items] |  |  |  |  |  |
Impairment charges |  |  |  | $ 4.0 |  |
Measurement inputs (as percent) |  |  |  | 0.25% |  |
Royalty Rate | Valuation Approach Discount Rate 100bps Increase | Knoll Trade Name |  |  |  |  |  |
Indefinite-lived Intangible Assets [Line Items] |  |  |  |  |  |
Impairment charges |  |  |  | $ 11.0 |  |
Measurement inputs (as percent) |  |  |  | 1.00% |  |
Royalty Rate | Valuation Approach Discount Rate 100bps Increase | Muuto Trade Name |  |  |  |  |  |
Indefinite-lived Intangible Assets [Line Items] |  |  |  |  |  |
Impairment charges |  |  |  | $ 6.0 |  |
Measurement inputs (as percent) |  |  |  | 1.00% |  |
Minimum | Discount Rate |  |  |  |  |  |
Indefinite-lived Intangible Assets [Line Items] |  |  |  |  |  |
Goodwill, measurement input (as percent) |  |  | 12.00% |  |  |
Intangible asset, measurement input (as percent) |  | 12.80% |  |  |  |
Minimum | Long-term Growth Rate |  |  |  |  |  |
Indefinite-lived Intangible Assets [Line Items] |  |  |  |  |  |
Goodwill, measurement input (as percent) |  |  | 2.50% |  |  |
Intangible asset, measurement input (as percent) |  | 2.50% |  |  |  |
Minimum | Royalty Rate |  |  |  |  |  |
Indefinite-lived Intangible Assets [Line Items] |  |  |  |  |  |
Intangible asset, measurement input (as percent) |  | 1.00% |  |  |  |
Maximum | Discount Rate |  |  |  |  |  |
Indefinite-lived Intangible Assets [Line Items] |  |  |  |  |  |
Goodwill, measurement input (as percent) |  |  | 15.00% |  |  |
Intangible asset, measurement input (as percent) |  | 17.30% |  |  |  |
Maximum | Long-term Growth Rate |  |  |  |  |  |
Indefinite-lived Intangible Assets [Line Items] |  |  |  |  |  |
Goodwill, measurement input (as percent) |  |  | 3.00% |  |  |
Intangible asset, measurement input (as percent) |  | 3.00% |  |  |  |
Maximum | Royalty Rate |  |  |  |  |  |
Indefinite-lived Intangible Assets [Line Items] |  |  |  |  |  |
Intangible asset, measurement input (as percent) |  | 3.00% |  |  |  |
North America Contract |  |  |  |  |  |
Indefinite-lived Intangible Assets [Line Items] |  |  |  |  |  |
Reporting unit, percentage of fair value in excess of carrying amount (percent) |  | 32.00% | 32.00% |  |  |
International Contract |  |  |  |  |  |
Indefinite-lived Intangible Assets [Line Items] |  |  |  |  |  |
Goodwill | $ 159.1 |  |  | $ 159.1 | $ 154.0 | $ 153.1
Reporting unit, percentage of fair value in excess of carrying amount (percent) |  | 63.00% | 63.00% |  |  |
Coverings Reporting Units |  |  |  |  |  |
Indefinite-lived Intangible Assets [Line Items] |  |  |  |  |  |
Reporting unit, percentage of fair value in excess of carrying amount (percent) |  | 10.00% | 10.00% |  |  |
Global Retail |  |  |  |  |  |
Indefinite-lived Intangible Assets [Line Items] |  |  |  |  |  |
Goodwill impairment |  | $ 30.1 |  |  |  |
Goodwill |  | 357.0 | $ 357.0 |  |  |
Holly Hunt |  |  |  |  |  |
Indefinite-lived Intangible Assets [Line Items] |  |  |  |  |  |
Goodwill impairment |  | 62.2 |  |  |  |
Goodwill |  | 33.0 | 33.0 |  |  |
Goodwill transfers in (out) |  |  | (33.0) |  |  |
Coverings Reporting Units | Pro Forma |  |  |  |  |  |
Indefinite-lived Intangible Assets [Line Items] |  |  |  |  |  |
Goodwill impairment |  | $ 3.0 |  |  |  |
North America Contract |  |  |  |  |  |
Indefinite-lived Intangible Assets [Line Items] |  |  |  |  |  |
Goodwill transfers in (out) |  |  | (26.1) |  |  |
International Contract Reporting Unit |  |  |  |  |  |
Indefinite-lived Intangible Assets [Line Items] |  |  |  |  |  |
Goodwill transfers in (out) |  |  | 26.1 |  |  |
Global Retail Reporting Unit |  |  |  |  |  |
Indefinite-lived Intangible Assets [Line Items] |  |  |  |  |  |
Goodwill transfers in (out) |  |  | $ 33.0 |  |  |

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